Connection and fastening unit for a lightning receptor for integration into a wind turbine rotor blade

Patent metadata

Field	Value
Publication number	US-10968896-B2
Application number	US-201715844169-A
Country	US
Kind code	B2
Filing date	Dec 15, 2017
Priority date	Dec 22, 2016
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

A connection and fastening unit for components of a lightning protection system, the connection and fastening unit being realized for the purpose of being integrated in a wind turbine rotor blade and for being connected to the components of the lightning protection system, wherein the connection and fastening unit includes a cavity which can be closed in an airtight manner and in which a connector for connection to at least one of the components of the lightning protection system is arranged.

First claim

What is claimed is:

1. A connection and fastening unit for components of a lightning protection system, the connection and fastening unit being configured to be integrated in a wind turbine rotor blade and to be connected to the components of the lightning protection system, the connection and fastening unit comprising:
a connection and fastening body defining a cavity configured to be closeable in an airtight manner;
at least one connector configured to connect to at least one of the components of the lightning protection system;
said at least one connector being arranged in said cavity;
said connection and fastening body including a base body produced from an electrically insulating material and a connection body produced from an electrically conducting material;
said base body and said connection body being fixedly interconnected;
said cavity being arranged between said base body and said connection body;
said at least one connector including a first connector having an inner thread in said connection body; and,
wherein said connection body has a bottom side configured to face away from an interior of the wind turbine rotor blade and a tubular portion at said bottom side; and, said inner thread is formed on an interior side of said tubular portion.

2. The connection and fastening unit of claim 1 , wherein the connection and fastening unit defines an installation position; said base body being configured to face an outside surface of the wind turbine rotor blade when the connection and fastening unit is in said installation position in the wind turbine rotor blade; and, said connection body being configured to face an interior of the wind turbine rotor blade when the connection and fastening unit is in said installation position in the wind turbine rotor blade.

3. The connection and fastening unit of claim 1 , wherein said base body includes a wall; said inner thread is arranged behind said wall of said base body when viewed from outside; and, said wall of said base body and said connection body conjointly define a gap therebetween in the region of said inner thread.

4. The connection and fastening unit of claim 3 further comprising:
a lightning receptor configured to connect to said first connector and defining a first outer diameter;
said connection body defining a second outer diameter; and,
said first outer diameter being larger than said second outer diameter of said connection body.

5. The connection and fastening unit of claim 4 further comprising:
a stop; and,
said lightning receptor being configured to rest against said stop when said lightning receptor is connected to said connection body.

6. The connection and fastening unit of claim 1 , wherein said base body defines a pass-through opening configured to be sealed in an air-tight manner via a blind plug.

7. The connection and fastening unit of claim 1 , wherein said at least one connector further includes a second connector; said second connector has a bore with an inner thread; said connection body includes a surface directed into said cavity; and, said bore is arranged in said surface.

8. The connection and fastening unit of claim 1 , wherein said connection body has a surface directed into an interior of the wind turbine rotor blade; and, said at least one connector includes a third connector which is arranged on said surface of said connection body and includes a bore with an internal thread.

9. The connection and fastening unit of claim 1 , wherein said inner thread is configured to engage an external thread of a lightning receptor.

10. A wind turbine rotor blade comprising:
at least one component of a lightning protection system;
a connection and fastening unit defining a cavity configured to be closable in an airtight manner;
said connection and fastening unit including at least one connector connected to said at least one component of the lightning protection system;
said at least one connector being arranged in said cavity;
said connection and fastening unit being integrated into the wind turbine rotor blade;
said connection and fastening unit including a base body produced from an electrically insulating material and a connection body produced from an electrically conducting material;
said base body and said connection body being fixedly interconnected;
said cavity being arranged between said base body and said connection body; and,
said at least one connector including a first connector having an inner thread in the connection body, wherein said connection body has a bottom side configured to face away from an interior of the wind turbine rotor blade and a tubular portion at said bottom side; and, said inner thread is formed on an interior side of said tubular portion.

11. A method for mounting components of a lightning protection system on a wind turbine rotor blade, the method comprising the steps of:
integrating a connection and fastening unit into the wind turbine rotor blade, the connection and fastening unit having a cavity which can be closed in an airtight manner and in which a connector for connection to at least one of the components of the lightning protection system is arranged;
opening the cavity before connecting the connector to the at least one component of the lightning protection system; and,
connecting the connector to the at least one component of the lightning protection system;
wherein the connection and fastening unit includes a base body produced from an electrically insulating material and a connection body produced from an electrically conducting material, the base body and the connection body are fixedly interconnected, and, the cavity is arranged between the base body and the connection body, wherein the connector includes a first connector having an inner thread in the connection body, wherein said connection body has a bottom side configured to face away from an interior of the wind turbine rotor blade and a tubular portion at said bottom side; and, said inner thread is formed on an interior side of said tubular portion.

12. The method of claim 11 , wherein the at least one of the components of the lightning protection system is a lightning receptor.

13. The method of claim 11 further comprising the step of connecting a lightning protector conductor to the connection and fastening unit.

14. The method of claim 13 , wherein the wind turbine rotor blade includes two half shells, the method further comprising:
joining the two half shells;
the connection and fastening unit being integrated into one of said two half shells;
said connecting of the connection and fastening unit to the lightning protector conductor takes place prior to said joining the two half shells; and,
said connecting of the connector to the at least one component of the lightning protection system takes place after said joining the two half shells.

15. The method of claim 14 further comprising the steps of:
integrating a further connection and fastening unit into the other one of the two half shells, the further connection and fastening unit defining a further cavity which can be closed in an air tight manner and in which a further connector for connection to at least one of the components of the lightning protection system is arranged;
inserting an electrical line into the wind turbine rotor blade; and,
electrically connecting the electrical line to the further connector of the further connection and fastening unit and the connector of the connection and fastening unit.

16. The method of claim 11 , wherein the wind turbine rotor blade has a wall of a sandwich construction including a

Assignees

• Nordex Energy Se & Co Kg

Inventors

• Klein Hendrik
• Lipka Thomas

Classifications

• F03D1/0675

  of the blades · CPC title

• F05B2230/60

  Assembly methods · CPC title

• H02G13/80

  Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps · CPC title

• Y02E10/72

  Wind turbines with rotation axis in wind direction · CPC title

• F03D80/30 Primary

  Lightning protection · CPC title